/*
    循环嵌套演示
*/
#include <stdio.h>
int main() {
    int num = 0, num1 = 0;
    for (num = 1; num <= 5;num++) {
	for (num1 = 5; num1 >= num; num1--) {
	    printf("%d", num1);
	}
    	printf("\n");
    }
    return 0;
}
